A digger Derek is a truck used to drill holes, set poles, and hang transformers. Notice I didn’t add “pull poles” to that list. Don’t do that, it tears your truck up over time and they cost as much as a Ferarri. We have these neat little tools called pole jacks that are designed for that exact thing.
Oh, you don’t believe me? Click here to see some evidence.
Your common moron will refer to this as a “boom truck” or “boom tip”. Perhaps they don’t realize that most trucks used in powerlines have a boom or two.